According to ADA guidelines, what is the maximum height for a side reach over an obstruction that is 10 inches deep?
Correct Answer
B) 46 inches
ADA guidelines specify that when reaching over an obstruction that is 10 inches deep, the maximum reach height is 46 inches. This ensures accessibility for people using wheelchairs.
Why This Is the Correct Answer
According to ADA Standards for Accessible Design Section 308.3.2, when reaching over an obstruction that is 10 inches deep, the maximum allowable reach height is 46 inches. This height ensures that individuals using wheelchairs can safely and comfortably reach over counters, desks, or other obstructions. The 46-inch limit is specifically designed to accommodate the typical reach range of wheelchair users when leaning forward over a 10-inch deep obstruction. This measurement is critical for compliance in commercial construction projects.
Why the Other Options Are Wrong
Option A: 48 inches
48 inches exceeds the ADA maximum reach height requirement for a 10-inch deep obstruction and would create accessibility barriers for wheelchair users who cannot safely reach that high over an obstruction.
Option C: 50 inches
54 inches far exceeds ADA requirements and would create a major accessibility violation, as this height would be unreachable for wheelchair users over any obstruction depth.
Option D: 54 inches
50 inches is significantly higher than the ADA requirement and would be completely inaccessible to most wheelchair users attempting to reach over a 10-inch deep obstruction.
Memory Technique
Remember '46 for 10' - when the obstruction is 10 inches deep, the maximum reach is 46 inches. Think of it as 'subtract 4 from 50' since 50 inches is the maximum reach with no obstruction.
Reference Hint
ADA Standards for Accessible Design, Section 308 - Reach Ranges, specifically subsection 308.3.2 which covers high forward reach over an obstruction
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